Answer
25ft by 35ft
Work Step by Step
(x)$\times$(x+10)=875
$x^{2}$+10x=875
$x^{2}$+10x -875 =0
quadratic formula:
$10^{2}$-4$\times$(-875)=3600
$\frac{-10 + or - \sqrt3600}{2}$
dimensions can't be negative so the only solution is
x=25
and x+10=35
